<div class="container">
    <nav class="navbar navbar-default" role="navigation">
        <div class="container-fluid">
            <!-- 导航头部 -->
            <div class="navbar-header">
                <!-- 移动设备上的导航切换按钮 -->
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse-example">
                    <span class="sr-only">切换导航</span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <!-- 品牌名称或logo -->
                <a class="navbar-brand" href="{:url('/')}">My Application</a>
            </div>
            <!-- 导航项目 -->
            <div class="collapse navbar-collapse navbar-collapse-example">
                <!-- 一般导航项目 -->
                <ul class="nav navbar-nav">
                    <li><a href="{:url('/')}">Home</a></li>
                    <li><a href="{:url('/en/aboutus')}">About us</a></li>
                    <li><a href="{:url('/en/contactus')}">Contact us</a></li>
                    <li><a href="{:url('/')}">中文版本</a></li>
                </ul>
            </div><!-- END .navbar-collapse -->
        </div>
    </nav>
</div>
    <div class="container">
        <div>keywords:{$site_keywords}</div>
        <div>description:{$site_description}</div>
        <div>jscode:{$site_jscode}</div>
    </div>